Preparation method of degree-of-functionality-adjustable ultraviolet light cured waterborne resin

A water-based resin and ultraviolet light technology, applied in the field of polymer materials, can solve the problems of single and single structure performance, achieve good wear resistance, good comprehensive physical and chemical properties, and solve the effect of water solubility mismatch

Active Publication Date: 2019-06-28
SHENZHEN POLYTECHNIC
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0008] Aiming at the above technical problems, the present invention discloses a preparation method of a UV-curable water-based resin with adjustable functionality. The obtained resin structure includes a polyacrylate main chain and a water-based polyurethane acrylate side chain, wherein the polyacrylate By controlling the proportion of monomers in the synthesis process, the resin can have a higher glass transition temperature, so that the resin has better hardness and other properties, and at the same time, the polyurethane acrylate in the side chain can endow the resin with better flexibility and durability. Abrasiveness, realize the mutual balance of multiple properties of a resin, and solve the problems that traditional water-based resins mostly have a single structure and performance.

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0049] In the first step, add 20g solvent propylene glycol methyl ether acetate, 40g methyl methacrylate, 20g butyl methacrylate, 40g methyl acrylate, 10g butyl acrylate, 60g hydroxyethyl methacrylate in a 500mL three-necked flask, 30g of styrene, stirred evenly, added catalyst azobisisobutyronitrile, which accounts for 0.8% of the total mass of the monomer, heated to 67°C while stirring, and reacted for 3 hours to obtain polyacrylate segment ① with hydroxyl groups in the side chain. In the acrylate segment, the mass percent content of hydroxyethyl methacrylate is 30%.

[0050] In the second step, add 1mol of toluene diisocyanate (TDI) and 18g of solvent propylene glycol methyl ether acetate into a 1000mL three-necked flask, heat to 68°C, and add 0.5% of dibutyltin dilaurate to 0.5mol of 2,3-dihydroxypropionic acid, gradually added to the toluene diisocyanate (TDI) solution, continued to react for 2.5 hours after the drop, added 0.4% p-hydroxyanisole to 1mol of hydroxyethyl me...

Embodiment 2

[0055] The first step, in 500mL there-necked flask, add 20g solvent ethylene glycol butyl ether acetate, 40g butyl acrylate, 60g methyl methacrylate, 40 butyl methacrylate, 40g hydroxyethyl acrylate, 20g acrylonitrile, stir Evenly, add 1.0% of the catalyst benzoyl peroxide tert-butyl peroxide, stir and heat to 66°C, and react for 3 hours to obtain a polyacrylate segment with a hydroxyl group in the side chain ①, polyacrylate In the chain segment, the mass percent content of hydroxyethyl acrylate is 20%.

[0056] In the second step, add 1mol of dicyclohexylmethane diisocyanate (HMDI), 16g of solvent ethylene glycol butyl ether acetate into a 1000mL three-necked flask, heat to 66°C, and dibutyltin dilaurate by 0.4% of the total mass Add to 0.5mol of 2,2-dimethylolbutyric acid, gradually add to dicyclohexylmethane diisocyanate (HMDI) solution, continue to react for 2.5h after dripping, add 0.6% to 1mol of hydroxyethyl acrylate Add p-hydroxyanisole to the above reaction system, r...

Embodiment 3

[0061] The first step, add 20g solvent propylene glycol diacetate, 30g butyl methacrylate, 40g methyl acrylate, 40g hydroxypropyl methacrylate, 40g hydroxypropyl acrylate, 20g hydroxyethyl methacrylate in a 500mL three-necked flask , 10g styrene, 20g acrylamide, stir evenly, add benzoyl peroxide as a catalyst accounting for 0.8% of the total mass of the monomer, heat to 73°C while stirring, and react for 2.5h to obtain polyacrylate with hydroxyl groups in the side chain Segment ①, in the polyacrylate segment, the total mass percentage content of hydroxypropyl methacrylate, hydroxypropyl acrylate and hydroxyethyl methacrylate is 50%.

[0062] In the second step, add 1mol of phenylmethane diisocyanate (MDI) and 15g of solvent propylene glycol diacetate to a 1000mL three-necked flask, heat to 65°C, and add 0.6% of dibutyltin dilaurate to 0.5mol 2,4-dihydroxybutyric acid, gradually added to the phenylmethane diisocyanate (MDI) solution, continued to react for 2.5 h after the drop,...

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Abstract

The invention provides a preparation method of degree-of-functionality-adjustable ultraviolet light cured waterborne resin. The method comprises the following steps that a polyacrylate chain segment with a side chain containing a hydroxide radical is synthesized; a polyurethane acrylate chain segment with a -NCO group at one end is synthesized, and the polyurethane acrylate chain segment containsa waterborne carboxylic acid group; the polyacrylate chain segment with the side chain containing the hydroxide radical and the polyurethane acrylate chain segment with the -NCO group at one end are subjected to a reaction, waterborne polyurethane acrylate modified polyacrylate is obtained, an alkali solution is added for neutralizing, and the anionic ultraviolet light cured waterborne resin. According to the technical scheme, by means of the resin, mutual balance of various properties is achieved, the viscosity is low, the water solubility is achieved, diluent is not needed, and environmentalfriendliness is better achieved; the obtained resin side chain has polyfunctionality, and the resin correlation degree is greatly improved in the curing process, and all the properties of a curing film are improved.

Description

technical field [0001] The invention belongs to the field of polymer materials, and in particular relates to a preparation method of an ultraviolet-curable water-based resin with adjustable functionality. Background technique [0002] Ultraviolet (UV) curing technology is an environmentally friendly curing technology. After the liquid coating is irradiated by ultraviolet light, a photochemical reaction occurs, which causes polymerization and crosslinking, and makes the liquid coating become a solid film in a short time. Because it has It has the advantages of fast curing speed, less environmental pollution, automatic production, and suitable for use on heat-sensitive substrates. It is expected to replace traditional solvent-based coatings, adhesives, inks, etc. in industry, and has good application prospects in most fields. According to the photocuring mechanism, there are two types of free radical curing and cationic curing. The free radical photocuring system has the adv...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C08G18/62C08G18/67C08G18/34C08F220/20C08F220/14C08F220/18C08F212/08C08F220/44C08F220/56
Inventor 刘红波张武英张霞
Owner SHENZHEN POLYTECHNIC
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